Shuumatsu no Harem - Season 1

A lethal pathogen known as the Man-Killer Virus has eliminated 99.9% of the global male population. After five years in cryogenic stasis, Mizuhara Reito awakens to a world radically transformed. Reito, along with four other surviving men, is now treated as a vital resource. Their designated purpose is to engage in widespread procreation to ensure humanity's continuation, and they are provided with luxurious accommodations for this role. Yet Reito's sole objective is to locate Tachibana Erisa, the woman he loved, who disappeared three years prior. He must navigate this society, driven by a desperate need for reproduction, while searching for his missing partner.